Per the rvwaterfilterstore
You have it set up very well, although I would suggest that if you have it set at 45 like may be indicated in the picture, that you move it up to the 60-65 psi range. If the park has it, you will enjoy that much more performance out of your water system. Obviously, if you are too concerned about pressure in the RV, you may choose to leave it at a lower pressure. Your plumbing is rated at 125 psi, so half that should not be an issue. Of course, you may have it already set higher and the pressure at the park is only 45. Anyway, you are good.
SO the Plumbing is rated at 125psi. And 55-60 may be a good spot. In practice I have rarely seen it this high...
2007 Chevy 2500HD Classic LBZ Duramax/Allison (Stock)
2005 Bigfoot 1500C8.2 AWESOME